Web Components

sw-call-media

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Renders the remote MCU video stream with aspect-ratio-aware sizing, plus a default slot positioned as an overlay layer on top of the video.

1<sw-call-provider token="YOUR_GUEST_TOKEN">
2  <sw-call-media>
3    <sw-self-media></sw-self-media>
4    <sw-participants></sw-participants>
5  </sw-call-media>
6</sw-call-provider>

sw-call-media is the visual canvas of the call. It binds to a remote MediaStream (provided directly via .stream, derived from a .call, or pulled from callStateContext) and attaches it to an internal <video> element with autoplay, muted, and playsinline.

To keep the rendered area inside the viewport regardless of host size, a ResizeObserver (debounced 50 ms) watches the host element, the <video> resize event watches the intrinsic media dimensions, and a window resize listener watches the viewport. A “contain” fitting algorithm picks the constraining dimension and re-applies a centered transform: translate(...). Audio-only tracks fall back to filling the container.

The element can run standalone (pass .call or .stream directly) or inside a provider (<sw-call-provider> / <sw-call-widget>), where it picks up the active call from context. Input precedence (most specific wins): .stream > .call > context.

Class: SwCallMedia · Module: packages/web-components/src/components/sw-call-media.ts

class: SwCallMedia, sw-call-media

Fields

call
Call | undefined

Explicit Call — when set, subscribes directly to its observables instead of relying on context. Overridden by .stream if both are set.

stream
MediaStream | nullDefaults to null

Explicit remote MediaStream — highest precedence. Bypasses both .call and context. Useful for raw rendering with no SDK at all.

Attributes

NameFieldInherited From
callcall

CSS Properties

NameDefaultDescription
--bg-page#0e0e18Background color shown behind the video (visible while the stream is loading or letterboxed for audio-only calls).

CSS Parts

NameDescription
containerOuter container (`.mcu-content`) that holds the video plus overlay layers. Style for backgrounds, drop shadows, etc.
videoThe internal `<video>` element rendering the MCU stream. Useful for `object-fit`, filters, and rounded corners.

Slots

NameDescription
Default slot rendered as an absolutely-positioned overlay layer above the remote video. Use it to compose `<sw-participants>`, `<sw-self-media>`, captions, branding, status chips, or any other UI.